Polyester polymers of 3-hydroxy-4'-(4-hydroxyphenyl) benzophenone or 3,4'-dihydroxybenzophenone and dicarboxylic acids.

摘要

Aromatic polyesters derived from at least 10% glycols of the structure
<Chemistry id="chema01" num="0001"><Image id="ia01" he="19" wi="66" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>or
<Chemistry id="chema02" num="0002"><Image id="ia02" he="18" wi="49" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>are disclosed. The polyesters have an inherent viscosity of at least 0.5 as measured from a 0.5 g solution in 100 ml of an equal volume mixture of p-chlorophenol and 1,2-dichloroethane, and a heat of fusion of less than 1.5 joule per gram.